Electrical train-stop.



PATENTED MAY '7,v 1907.

H. G. SBDGWIGK. ELECTRICAL TRAIN STOP.

APPLICATION FILED JUNE 14,1906.

with 745% UNITED sTATE's PATENT OFFICE.

ELECTRICAL TRAIN-STOP.

N o. 852,63 1. Specification 'of Letters Patent. Patented May '7., 1907.

Application filed June 14, lSlOG. Serialvlo. 321,761.-

Be it known that I, HIRAM G. SEDGWICK, a i

citizenof the United States of America, and a resident. of Mill Valley,county of Marin, State of California, have invented certain new anduseful Improvements in Electrical.'

Train-Stops, of which the following is a full and clear speciiication,reference being had to the accompanying drawings, in which` Figure 1 1sa diagram showmg one section orb lock of a single track roadway; Fig. 2a

' each similar view showing a slightly modified arrangement; and Fig. 3a side elevation show- 1 ing the modified form of the stop ing magnetand the magnetically-controller train-stopping circuit on the-locomotiveor other veiicle of the train. ,'Ihe'object of this'invention is torovide an extremely simple block system ihr preventing collisions, meansbeing provided ywhereby each train as it proceeds prempts a block orsection of the roadway, preventing any train coming from eitherdirection from entering the block until it is free of trains, the

means for preventing trains from entering the block `while thuspreempt-ed being en.- tirely automatic and inde endent of all signalsand the actions vof t 1e train-crews, as more fully hereinafter setforth.

In its preferred form this invention consists in dividm u the track intosections c constituting t e blocks, the rails in these blocks beingsuitably bonded. Between the ends of pair of adjacent blocks is arrangeda short rail section t insulated lfrom the block. sections pro er. Aportion, c', of each end i of each bloc section, as shown in Fig. 1, is

`. made neutral by being insulated from mail` l lsection c and thesh'ort section t. 40

Adjacentto the short section t, on each sideof the track or roadbed isarranged a artial circuit with a suitabl'ebattexyand with the short railseo" -tionft and the. rails of one of the adjacent 4 5 block sections c;that is to say, this magnet .is in a circuit'whch. is broken at twopoints, vonevbreak voccurrin, ,r between y,themain block railsA andthe'other breakl between the short rail sections.- I nthe drawing the magnetat the ri ht side of the roadbed is connected -with t e block railsahead and the magnet of theo'ther side is connected lwith the blockrails next in the rear. The neutral rail sectiopsjc. are'insulated fromall circuits andrails. f

adapted to be actuated by magnetism. In

the device shown an armature c is carried by a spring-retracted arm e,in such position that as' the train moves along the track it will passclose enough to the magnet to be drawn downwardly if the magnet beenergized.

When thus drawn downwardly a circuit f f;

will be closediin which circuit a suitable bat'- tery and a brake magnetwillbe included. Any other circuit-closin ployed, and it will. be oviousalso that the brakel magnet'may be adaptedv to operate any suitabletrain-stopping mechanism, al-

a bra e-pipe venting device.

There wlll be two of these circuit-closers on each train, one at eachside thereof, and a suitable switch will be arranged to .automaticallycut out one or the other of these circuits by the.` reversal of thereverse lever of the locomotive, so that the armature onfthe right sideonly ofthe train will be subjected devi-cemay be em-` i thou h I preferthat it be arranged to actuate to the influence of the magnets on theroady train is on the block railsl the wheels and axles thereof serve toclose the magnet circuit connected to each end of the block eX- cept atthe point between the short rails b. It will be seen, therefore. thatshould another train pass onto the short section at either end of theblock, the circuit at1 the right -hand side of that short section wouldbe completed, thus energizing the magnet included in that circuit. Thusenergizingthe magnet automatically actuates the armature carried on thatside of the locomotive, completing the circuit on the locomotive andapplying the brakes. This manner of. completing the circuits by means oftwo' trains is shown in Fig. 2 where is illustrated one pair of wheelsof each of thel two trains approachingeach other. In this instance itw1ll vbe observed that the train on the short rails will be stopped bythe magnet at the right of the roadbed. It will thus be observed that itlwill'bejimpssible fortwo trains to meet, either going `in the samedirection or opposite directions, upon the same block.

IOO

, IIO

The non-active sections a, shown in Fig.

long as the longesttrains, so t ata trainy cannot extend from the shortra'ils to the block railsand thus waste current. It will be4 observedthat by this system I do away with all brushes on the locomotive andcontacts on the roadbed, thus doing away with a yourcepf great'troubl'e.p

It'will -be observed that-,instead of magnets I may eiri'ployv suitableinduction coils on the roadbed in which case a suitable deflectingneedle or another i induction vcoil `may be mounted on the locomotive toclose the brake magnet circuit as the needle or coil passes through theield'of the-'r'oadbed coil; it ,will be understood, therefore, thatwherever I employ the term magnet in the claims this term will have thisbroader significance.

What I claim and desire to secure by Letters Patent is 1. In atrain-stoppingblock system, the combination ofthe main block railssuitably bonded, an insulated short rail section between the adjacentends vof each main block,

y a magnet adjacent to each short rail section,

and a partial vcircuit including a battery and said magnet at each shortrail section, this circuit being connectedl at one end'to one of theadjacent bloclI-sections 'and at vthe other .end to the shortrailsection, for the purpose set forth.

2. In combination, aseries of main block rails suitably bonded-'aninsulated short rail section bet,ween lthe ends of each adjacent blockrail sections, a magnetic deviceon the vroadbed at each side ofeachshort rail sec tion, and. a partial circuit for each magnetic f device,said circuitincludi-ng al battery and `havin its terminals a-t one endconnected to the a jacent short rail section and the ter minals at theother end connected to the adl jacent end of one of'the block sections,for the purpose set forth.

3. In a block system of the type set forth,

' main block rails, short rail sections intermediate the main blockrails, a neutral rail section between each-short rail section and theadjacent niain block rails, a magnetic device at either side of theroadway adjacent to each short rail section, and a partial-circuit foreach magnetic device, said circuit includi-n a battery and connected atone Yend to t e short rail section and at its other end to the adjacentend of one of the block sections.

4. In a train-stopping block system,` a series of rail blocks having aninsulated short rail' section between ther-n, a magnetic stopsections,this magnetic device being included in a partial circuit one branch ofwhich is connected to the adjacent insulated short rail section and theother branch of which is con# ping device adjacent each of said 'shortrail nected to the adjacent right hand rail of the 1 next block ahead,the rei'nainderof said circuit having included in it a batteryv andhaving one-end ccnn'ected to the left hand rail of the blockv ahead andits other end connected 'to the opposite short rail section, substaibAtially as and for the purpose set forth. y

In testimony whereof I hereunto aifix my signature in the presence oftwo witnesses this 3rd day of April 1906.

HIRAM G. SEDGWICK,

fitnesses :l

S. H. ROBERTS, J. H. ARNINSTEAD.

